Show messages for builds and large downloads in non-interactive mode (#11165)

When stderr is not a tty, we currently don't show any messages for build
or large downloads, since indicatif is hidden. We can improve this by
showing a message for:

* Starting and finishing a large download (>1MB)
* Starting and finishing a build

Downloads are limited to 1MB or unknown size to keep the logs concise
and not scroll the entire terminal away for a download that finishes
almost immediately.

These messages are not captured in the tests since their order is
non-deterministic (downloads and builds race to finish).

There are no "tick" messages for large downloads yet, we could e.g. show
an update on runnning downloads every n seconds.

Part of #11121

**Test Plan**

```
$ uv venv && FORCE_COLOR=1 cargo run -q pip install numpy --no-binary :all: --no-cache 2>&1 | tee a.txt
  Using CPython 3.13.0
  Creating virtual environment at: .venv
  Activate with: source .venv/bin/activate
  Resolved 1 package in 221ms
     Building numpy==2.2.2
        Built numpy==2.2.2
  Prepared 1 package in 2m 34s
  Installed 1 package in 6ms
   + numpy==2.2.2
```


![image](https://github.com/user-attachments/assets/f4b64313-afa7-449f-9e5b-2b1b7026bef3)


```
$ uv venv && FORCE_COLOR=1 cargo run -q pip install torch --no-cache 2>&1 | tee b.txt
  Using CPython 3.13.0
  Creating virtual environment at: .venv
  Activate with: source .venv/bin/activate
  Resolved 24 packages in 648ms
  Downloading setuptools (1.2MiB)
  Downloading nvidia-cuda-cupti-cu12 (13.2MiB)
  Downloading torch (731.1MiB)
  Downloading nvidia-nvjitlink-cu12 (20.1MiB)
  Downloading nvidia-cufft-cu12 (201.7MiB)
  Downloading nvidia-cuda-nvrtc-cu12 (23.5MiB)
  Downloading nvidia-curand-cu12 (53.7MiB)
  Downloading nvidia-nccl-cu12 (179.9MiB)
  Downloading nvidia-cudnn-cu12 (634.0MiB)
  Downloading nvidia-cublas-cu12 (346.6MiB)
  Downloading sympy (5.9MiB)
  Downloading nvidia-cusparse-cu12 (197.8MiB)
  Downloading nvidia-cusparselt-cu12 (143.1MiB)
  Downloading networkx (1.6MiB)
  Downloading nvidia-cusolver-cu12 (122.0MiB)
  Downloading triton (241.4MiB)
   Downloaded setuptools
   Downloaded networkx
   Downloaded sympy
   Downloaded nvidia-cuda-cupti-cu12
   Downloaded nvidia-nvjitlink-cu12
   Downloaded nvidia-cuda-nvrtc-cu12
   Downloaded nvidia-curand-cu12
[...]
```


![image](https://github.com/user-attachments/assets/71918d94-c5c0-44ce-bea8-aaba6cd80ef7)

crates/uv-git/src/source.rs

@@ -133,7 +133,7 @@ impl GitSource {
         // Report the checkout operation to the reporter.
         if let Some(task) = task {
             if let Some(reporter) = self.reporter.as_ref() {
-                reporter.on_checkout_complete(remote.url(), short_id.as_str(), task);
+                reporter.on_checkout_complete(remote.url(), actual_rev.as_str(), task);
             }
         }
 

crates/uv-static/src/env_vars.rs

@@ -579,6 +579,10 @@ impl EnvVars {
     #[attr_hidden]
     pub const UV_TEST_INDEX_URL: &'static str = "UV_TEST_INDEX_URL";
 
+    /// Hide progress messages with non-deterministic order in tests.
+    #[attr_hidden]
+    pub const UV_TEST_NO_CLI_PROGRESS: &'static str = "UV_TEST_NO_CLI_PROGRESS";
+
     /// `.env` files from which to load environment variables when executing `uv run` commands.
     pub const UV_ENV_FILE: &'static str = "UV_ENV_FILE";
 

crates/uv/src/commands/reporters.rs

@@ -1,4 +1,6 @@
 use std::env;
+use std::fmt::Write;
+use std::sync::LazyLock;
 use std::sync::{Arc, Mutex};
 use std::time::Duration;
 
@@ -7,6 +9,8 @@ use owo_colors::OwoColorize;
 use rustc_hash::FxHashMap;
 use url::Url;
 
+use crate::commands::human_readable_bytes;
+use crate::printer::Printer;
 use uv_cache::Removal;
 use uv_distribution_types::{
     BuildableSource, CachedDist, DistributionMetadata, Name, SourceDist, VersionOrUrlRef,
@@ -16,7 +20,10 @@ use uv_pep440::Version;
 use uv_python::PythonInstallationKey;
 use uv_static::EnvVars;
 
-use crate::printer::Printer;
+/// Since downloads, fetches and builds run in parallel, their message output order is
+/// non-deterministic, so can't capture them in test output.
+static HAS_UV_TEST_NO_CLI_PROGRESS: LazyLock<bool> =
+    LazyLock::new(|| env::var(EnvVars::UV_TEST_NO_CLI_PROGRESS).is_ok());
 
 #[derive(Debug)]
 struct ProgressReporter {
@@ -44,6 +51,8 @@ struct BarState {
     sizes: Vec<u64>,
     /// A map of progress bars, by ID.
     bars: FxHashMap<usize, ProgressBar>,
+    /// The download size, if known, by ID.
+    download_size: FxHashMap<usize, Option<u64>>,
     /// A monotonic counter for bar IDs.
     id: usize,
 }
@@ -95,11 +104,15 @@ impl ProgressReporter {
         );
 
         progress.set_style(ProgressStyle::with_template("{wide_msg}").unwrap());
-        progress.set_message(format!(
+        let message = format!(
-            "{} {}",
+            "   {} {}",
             "Building".bold().cyan(),
             source.to_color_string()
-        ));
+        );
+        if multi_progress.is_hidden() && !*HAS_UV_TEST_NO_CLI_PROGRESS {
+            let _ = writeln!(self.printer.stderr(), "{message}");
+        }
+        progress.set_message(message);
 
         state.headers += 1;
         state.bars.insert(id, progress);
@@ -107,7 +120,11 @@ impl ProgressReporter {
     }
 
     fn on_build_complete(&self, source: &BuildableSource, id: usize) {
-        let ProgressMode::Multi { state, .. } = &self.mode else {
+        let ProgressMode::Multi {
+            state,
+            multi_progress,
+        } = &self.mode
+        else {
             return;
         };
 
@@ -117,11 +134,15 @@ impl ProgressReporter {
             state.bars.remove(&id).unwrap()
         };
 
-        progress.finish_with_message(format!(
+        let message = format!(
-            "   {} {}",
+            "      {} {}",
             "Built".bold().green(),
             source.to_color_string()
-        ));
+        );
+        if multi_progress.is_hidden() && !*HAS_UV_TEST_NO_CLI_PROGRESS {
+            let _ = writeln!(self.printer.stderr(), "{message}");
+        }
+        progress.finish_with_message(message);
     }
 
     fn on_download_start(&self, name: String, size: Option<u64>) -> usize {
@@ -145,7 +166,7 @@ impl ProgressReporter {
             ProgressBar::with_draw_target(size, self.printer.target()),
         );
 
-        if size.is_some() {
+        if let Some(size) = size {
             // We're using binary bytes to match `human_readable_bytes`.
             progress.set_style(
                 ProgressStyle::with_template(
@@ -154,15 +175,36 @@ impl ProgressReporter {
                 .unwrap()
                 .progress_chars("--"),
             );
+            // If the download is larger than 1MB, show a message to indicate that this may take
+            // a while keeping the log concise.
+            if multi_progress.is_hidden() && !*HAS_UV_TEST_NO_CLI_PROGRESS && size > 1024 * 1024 {
+                let (bytes, unit) = human_readable_bytes(size);
+                let _ = writeln!(
+                    self.printer.stderr(),
+                    "{} {} {}",
+                    "Downloading".bold().cyan(),
+                    name,
+                    format!("({bytes:.1}{unit})").dimmed()
+                );
+            }
             progress.set_message(name);
         } else {
             progress.set_style(ProgressStyle::with_template("{wide_msg:.dim} ....").unwrap());
+            if multi_progress.is_hidden() && !*HAS_UV_TEST_NO_CLI_PROGRESS {
+                let _ = writeln!(
+                    self.printer.stderr(),
+                    "{} {}",
+                    "Downloading".bold().cyan(),
+                    name
+                );
+            }
             progress.set_message(name);
             progress.finish();
         }
 
         let id = state.id();
         state.bars.insert(id, progress);
+        state.download_size.insert(id, size);
         id
     }
 
@@ -175,11 +217,29 @@ impl ProgressReporter {
     }
 
     fn on_download_complete(&self, id: usize) {
-        let ProgressMode::Multi { state, .. } = &self.mode else {
+        let ProgressMode::Multi {
+            state,
+            multi_progress,
+        } = &self.mode
+        else {
             return;
         };
 
         let progress = state.lock().unwrap().bars.remove(&id).unwrap();
+
+        let size = state.lock().unwrap().download_size[&id];
+        if multi_progress.is_hidden()
+            && !*HAS_UV_TEST_NO_CLI_PROGRESS
+            && size.is_none_or(|size| size > 1024 * 1024)
+        {
+            let _ = writeln!(
+                self.printer.stderr(),
+                " {} {}",
+                "Downloaded".bold().green(),
+                progress.message()
+            );
+        }
+
         progress.finish_and_clear();
     }
 
@@ -201,12 +261,11 @@ impl ProgressReporter {
         );
 
         progress.set_style(ProgressStyle::with_template("{wide_msg}").unwrap());
-        progress.set_message(format!(
+        let message = format!("   {} {} ({})", "Updating".bold().cyan(), url, rev.dimmed());
-            "{} {} ({})",
+        if multi_progress.is_hidden() && !*HAS_UV_TEST_NO_CLI_PROGRESS {
-            "Updating".bold().cyan(),
+            let _ = writeln!(self.printer.stderr(), "{message}");
-            url,
+        }
-            rev.dimmed()
+        progress.set_message(message);
-        ));
         progress.finish();
 
         state.headers += 1;
@@ -215,7 +274,11 @@ impl ProgressReporter {
     }
 
     fn on_checkout_complete(&self, url: &Url, rev: &str, id: usize) {
-        let ProgressMode::Multi { state, .. } = &self.mode else {
+        let ProgressMode::Multi {
+            state,
+            multi_progress,
+        } = &self.mode
+        else {
             return;
         };
 
@@ -225,12 +288,16 @@ impl ProgressReporter {
             state.bars.remove(&id).unwrap()
         };
 
-        progress.finish_with_message(format!(
+        let message = format!(
-            " {} {} ({})",
+            "    {} {} ({})",
             "Updated".bold().green(),
             url,
             rev.dimmed()
-        ));
+        );
+        if multi_progress.is_hidden() && !*HAS_UV_TEST_NO_CLI_PROGRESS {
+            let _ = writeln!(self.printer.stderr(), "{message}");
+        }
+        progress.finish_with_message(message);
     }
 }
 

crates/uv/tests/it/common/mod.rs

@@ -555,6 +555,9 @@ impl TestContext {
             .env(EnvVars::UV_PYTHON_DOWNLOADS, "never")
             .env(EnvVars::UV_TEST_PYTHON_PATH, self.python_path())
             .env(EnvVars::UV_EXCLUDE_NEWER, EXCLUDE_NEWER)
+            // Since downloads, fetches and builds run in parallel, their message output order is
+            // non-deterministic, so can't capture them in test output.
+            .env(EnvVars::UV_TEST_NO_CLI_PROGRESS, "1")
             .env_remove(EnvVars::UV_CACHE_DIR)
             .env_remove(EnvVars::UV_TOOL_BIN_DIR)
             .current_dir(self.temp_dir.path());